似乎可以在结构内部传递结构，有什么想法吗？

Question

每次我尝试初始化一个结构体以放置在名为“meal”的数组中，该数组包含一个结构体和一个整数时，都会出现以下错误:

..\meal_plan.c:92:5:警告:初始化器周围缺少大括号 [-Wmissing-braces]

..\meal_plan.c:92:5:警告:(接近“fpi1.fs”初始化)[-Wmissing-braces]

..\meal_plan.c:92:5:警告:初始化从指针生成整数而不进行强制转换[默认启用]

..\meal_plan.c:92:5:警告:(“fpi1.fs.name[0]”接近初始化)[默认启用]

我一生都无法弄清楚出了什么问题。我真的很感激有人对我所缺少的东西发表意见。

  struct food_stuff
  {
      char name [30];
      int foodtype;
      int calories;
      int price;
  };

  typedef struct food_stuff food_stuff;

  struct food_plan_item
   {
      food_stuff fs;
      int qty;
  };

  typedef struct food_plan_item food_plan_item;

food_plan_item 膳食 [50]；

  void choose_food_item()
  {
      puts("Please select one of the available foods:");
      puts("-----------------------------------------");


      for(int i =  0;i <f_cnt;i++)
      {
          printf("\t(%d.) %s\n",i, (foodArray+i)->name);
      }
      puts("-----------------------------------------");
      fflush(stdout);

      char itemSelection [3];
      int chosenitem;

      gets(itemSelection);

      sscanf(itemSelection,"%d",&chosenitem);

      food_stuff *pfs;
      pfs = (foodArray+chosenitem);

      food_plan_item fpi1 = {pfs,1}; **(LINE 92)**

      add_food_plan_item(&fpi1);


  }

  void add_food_plan_item(food_plan_item *p_fpi)
  {

      meal[fpi_count] = *p_fpi;


      fpi_count++;
  }

Answer 1

您必须将 pfs 指向的内容复制到 fpi1.fs；

food_plan_item fpi1 = {.qty = 1}; // designated initializer

memcpy(&fpi1.fs, pfs, sizeof(food_stuff));

或者您可以将 food_plan_item 的 fs 成员声明为指针，然后直接分配指针:

food_stuff *fs;